/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:12:31,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:12:31,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:12:31,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:12:31,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:12:31,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:12:31,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:12:31,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:12:31,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:12:31,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:12:31,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:12:31,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:12:31,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:12:31,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:12:31,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:12:31,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:12:31,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:12:31,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:12:31,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:12:31,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:12:31,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:12:31,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:12:31,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:12:31,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:12:31,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:12:31,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:12:31,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:12:31,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:12:31,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:12:31,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:12:31,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:12:31,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:12:31,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:12:31,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:12:31,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:12:31,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:12:31,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:12:31,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:12:31,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:12:31,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:12:31,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:12:31,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:12:31,846 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:12:31,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:12:31,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:12:31,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:12:31,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:12:31,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:12:31,847 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:12:31,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:12:31,847 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:12:31,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:12:31,848 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:12:31,848 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:12:31,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:12:31,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:12:31,848 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:12:31,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:12:31,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:12:31,849 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:12:31,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:12:31,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:12:31,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:12:31,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:12:31,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:12:31,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:12:32,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:12:32,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:12:32,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:12:32,046 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:12:32,046 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:12:32,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 06:12:33,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:12:33,395 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:12:33,396 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 06:12:33,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41547aad5/ba18b97236e84341a0faaf0c3fc459ef/FLAGc08ed52ab [2023-04-01 06:12:33,745 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41547aad5/ba18b97236e84341a0faaf0c3fc459ef [2023-04-01 06:12:33,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:12:33,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:12:33,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:12:33,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:12:33,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:12:33,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:12:33" (1/1) ... [2023-04-01 06:12:33,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb56173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:33, skipping insertion in model container [2023-04-01 06:12:33,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:12:33" (1/1) ... [2023-04-01 06:12:33,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:12:33,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:12:33,965 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c[14700,14713] [2023-04-01 06:12:33,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:12:33,976 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:12:34,018 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c[14700,14713] [2023-04-01 06:12:34,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:12:34,029 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:12:34,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34 WrapperNode [2023-04-01 06:12:34,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:12:34,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:12:34,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:12:34,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:12:34,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:12:34,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:12:34,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:12:34,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:12:34,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (1/1) ... [2023-04-01 06:12:34,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:12:34,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:34,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:12:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side1_failed_history [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure write_side2_failed_history [2023-04-01 06:12:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure write_active_side_history [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure write_manual_selection_history [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure Console_task_each_pals_period [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure Side1_activestandby_task_each_pals_period [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure Side2_activestandby_task_each_pals_period [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure Pendulum_prism_task_each_pals_period [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:12:34,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:12:34,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure write_side1_failed_history [2023-04-01 06:12:34,128 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure write_side2_failed_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure write_active_side_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure write_manual_selection_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure Console_task_each_pals_period [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure Side1_activestandby_task_each_pals_period [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure Side2_activestandby_task_each_pals_period [2023-04-01 06:12:34,129 INFO L130 BoogieDeclarations]: Found specification of procedure Pendulum_prism_task_each_pals_period [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:12:34,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:12:34,215 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:12:34,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:12:34,737 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:12:34,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:12:34,843 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:12:34,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:12:34 BoogieIcfgContainer [2023-04-01 06:12:34,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:12:34,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:12:34,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:12:34,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:12:34,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:12:33" (1/3) ... [2023-04-01 06:12:34,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727c4427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:12:34, skipping insertion in model container [2023-04-01 06:12:34,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:12:34" (2/3) ... [2023-04-01 06:12:34,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727c4427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:12:34, skipping insertion in model container [2023-04-01 06:12:34,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:12:34" (3/3) ... [2023-04-01 06:12:34,866 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.BOUNDED-10.pals.c [2023-04-01 06:12:34,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:12:34,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:12:34,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:12:34,932 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5da7dd09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:12:34,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:12:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 127 states have internal predecessors, (185), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 06:12:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 06:12:34,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:34,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:34,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:34,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -327406355, now seen corresponding path program 1 times [2023-04-01 06:12:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326932850] [2023-04-01 06:12:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:12:35,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:35,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326932850] [2023-04-01 06:12:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326932850] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:35,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:12:35,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:12:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363092858] [2023-04-01 06:12:35,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:35,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:12:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:35,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:12:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:12:35,378 INFO L87 Difference]: Start difference. First operand has 190 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 127 states have internal predecessors, (185), 43 states have call successors, (43), 19 states have call predecessors, (43), 19 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-01 06:12:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:35,521 INFO L93 Difference]: Finished difference Result 373 states and 563 transitions. [2023-04-01 06:12:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:12:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 48 [2023-04-01 06:12:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:35,530 INFO L225 Difference]: With dead ends: 373 [2023-04-01 06:12:35,530 INFO L226 Difference]: Without dead ends: 191 [2023-04-01 06:12:35,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:12:35,541 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 5 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:35,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 746 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:12:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-04-01 06:12:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-04-01 06:12:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 128 states have (on average 1.4453125) internal successors, (185), 128 states have internal predecessors, (185), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-01 06:12:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 270 transitions. [2023-04-01 06:12:35,581 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 270 transitions. Word has length 48 [2023-04-01 06:12:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:35,581 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 270 transitions. [2023-04-01 06:12:35,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-01 06:12:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 270 transitions. [2023-04-01 06:12:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 06:12:35,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:35,584 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:12:35,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:35,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1229930792, now seen corresponding path program 1 times [2023-04-01 06:12:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:35,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23581942] [2023-04-01 06:12:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:36,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23581942] [2023-04-01 06:12:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23581942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005865629] [2023-04-01 06:12:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:36,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:12:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:36,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:12:36,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:12:36,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005865629] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:36,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 06:12:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702259977] [2023-04-01 06:12:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:36,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:12:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:12:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:12:36,754 INFO L87 Difference]: Start difference. First operand 191 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 06:12:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:37,549 INFO L93 Difference]: Finished difference Result 430 states and 607 transitions. [2023-04-01 06:12:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:12:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 66 [2023-04-01 06:12:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:37,553 INFO L225 Difference]: With dead ends: 430 [2023-04-01 06:12:37,553 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 06:12:37,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:12:37,555 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 507 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:37,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 66 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 06:12:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 06:12:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2023-04-01 06:12:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 164 states have internal predecessors, (233), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-01 06:12:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2023-04-01 06:12:37,579 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 66 [2023-04-01 06:12:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:37,580 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2023-04-01 06:12:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 06:12:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2023-04-01 06:12:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 06:12:37,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:37,582 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:37,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:37,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:37,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1539548420, now seen corresponding path program 1 times [2023-04-01 06:12:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:37,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518045003] [2023-04-01 06:12:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:37,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:38,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518045003] [2023-04-01 06:12:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518045003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:38,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696589244] [2023-04-01 06:12:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:38,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:38,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:12:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:38,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:12:38,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:12:38,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696589244] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:38,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:38,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-04-01 06:12:38,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799150627] [2023-04-01 06:12:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:38,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:12:38,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:12:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:12:38,665 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 06:12:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:39,357 INFO L93 Difference]: Finished difference Result 432 states and 609 transitions. [2023-04-01 06:12:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:12:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 67 [2023-04-01 06:12:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:39,360 INFO L225 Difference]: With dead ends: 432 [2023-04-01 06:12:39,360 INFO L226 Difference]: Without dead ends: 249 [2023-04-01 06:12:39,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:12:39,361 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 496 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:39,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 74 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 06:12:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-01 06:12:39,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2023-04-01 06:12:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 164 states have internal predecessors, (233), 54 states have call successors, (54), 29 states have call predecessors, (54), 28 states have return successors, (54), 51 states have call predecessors, (54), 53 states have call successors, (54) [2023-04-01 06:12:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2023-04-01 06:12:39,382 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 67 [2023-04-01 06:12:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:39,382 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2023-04-01 06:12:39,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 06:12:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2023-04-01 06:12:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 06:12:39,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:39,384 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:39,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:39,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 06:12:39,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:39,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash -377193149, now seen corresponding path program 1 times [2023-04-01 06:12:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:39,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480904768] [2023-04-01 06:12:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:40,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480904768] [2023-04-01 06:12:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480904768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583536757] [2023-04-01 06:12:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:40,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:40,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 06:12:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:40,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 06:12:40,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:40,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583536757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:40,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-04-01 06:12:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621511030] [2023-04-01 06:12:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:12:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:12:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:12:40,416 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 06:12:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:40,689 INFO L93 Difference]: Finished difference Result 664 states and 927 transitions. [2023-04-01 06:12:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:12:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2023-04-01 06:12:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:40,692 INFO L225 Difference]: With dead ends: 664 [2023-04-01 06:12:40,692 INFO L226 Difference]: Without dead ends: 443 [2023-04-01 06:12:40,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:12:40,694 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 241 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:40,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1363 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:12:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-04-01 06:12:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 430. [2023-04-01 06:12:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 287 states have (on average 1.4390243902439024) internal successors, (413), 292 states have internal predecessors, (413), 94 states have call successors, (94), 47 states have call predecessors, (94), 48 states have return successors, (97), 90 states have call predecessors, (97), 93 states have call successors, (97) [2023-04-01 06:12:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 604 transitions. [2023-04-01 06:12:40,733 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 604 transitions. Word has length 69 [2023-04-01 06:12:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:40,733 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 604 transitions. [2023-04-01 06:12:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.5) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 06:12:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 604 transitions. [2023-04-01 06:12:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 06:12:40,735 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:40,736 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:40,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:40,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:40,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:40,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash 482839559, now seen corresponding path program 1 times [2023-04-01 06:12:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106720133] [2023-04-01 06:12:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:41,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:41,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106720133] [2023-04-01 06:12:41,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106720133] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:41,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691169529] [2023-04-01 06:12:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:41,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:41,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:41,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:41,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 06:12:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:41,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 06:12:41,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:12:41,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:12:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:12:41,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691169529] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:41,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 06:12:41,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2023-04-01 06:12:41,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517814212] [2023-04-01 06:12:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:41,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:12:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:12:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:12:41,873 INFO L87 Difference]: Start difference. First operand 430 states and 604 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-04-01 06:12:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:41,990 INFO L93 Difference]: Finished difference Result 774 states and 1106 transitions. [2023-04-01 06:12:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:12:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 71 [2023-04-01 06:12:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:41,993 INFO L225 Difference]: With dead ends: 774 [2023-04-01 06:12:41,993 INFO L226 Difference]: Without dead ends: 434 [2023-04-01 06:12:41,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:12:41,995 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 14 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:41,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 975 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:12:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-04-01 06:12:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 426. [2023-04-01 06:12:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 285 states have (on average 1.4350877192982456) internal successors, (409), 290 states have internal predecessors, (409), 92 states have call successors, (92), 47 states have call predecessors, (92), 48 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 596 transitions. [2023-04-01 06:12:42,022 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 596 transitions. Word has length 71 [2023-04-01 06:12:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:42,023 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 596 transitions. [2023-04-01 06:12:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-04-01 06:12:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 596 transitions. [2023-04-01 06:12:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 06:12:42,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:42,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:42,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:42,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:42,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:42,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1903035337, now seen corresponding path program 1 times [2023-04-01 06:12:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:42,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012638682] [2023-04-01 06:12:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:42,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012638682] [2023-04-01 06:12:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012638682] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394167553] [2023-04-01 06:12:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:42,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:42,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:42,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:42,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 06:12:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:42,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 06:12:42,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:12:42,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394167553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:42,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:42,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-04-01 06:12:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015464624] [2023-04-01 06:12:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:42,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:12:42,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:12:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:12:42,912 INFO L87 Difference]: Start difference. First operand 426 states and 596 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-01 06:12:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:42,970 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2023-04-01 06:12:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:12:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 78 [2023-04-01 06:12:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:42,973 INFO L225 Difference]: With dead ends: 766 [2023-04-01 06:12:42,973 INFO L226 Difference]: Without dead ends: 426 [2023-04-01 06:12:42,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:12:42,975 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:42,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 728 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:12:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-04-01 06:12:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2023-04-01 06:12:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 285 states have (on average 1.4280701754385965) internal successors, (407), 290 states have internal predecessors, (407), 92 states have call successors, (92), 47 states have call predecessors, (92), 48 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 594 transitions. [2023-04-01 06:12:43,000 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 594 transitions. Word has length 78 [2023-04-01 06:12:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:43,001 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 594 transitions. [2023-04-01 06:12:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-01 06:12:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 594 transitions. [2023-04-01 06:12:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 06:12:43,002 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:43,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:43,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:43,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:43,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1717293283, now seen corresponding path program 1 times [2023-04-01 06:12:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:43,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301127385] [2023-04-01 06:12:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:43,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301127385] [2023-04-01 06:12:43,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301127385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399077969] [2023-04-01 06:12:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:43,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:43,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:43,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 06:12:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:43,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 06:12:43,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:12:44,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:44,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399077969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:44,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:44,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-01 06:12:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337225559] [2023-04-01 06:12:44,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:44,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:12:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:12:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:12:44,019 INFO L87 Difference]: Start difference. First operand 426 states and 594 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-01 06:12:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:44,129 INFO L93 Difference]: Finished difference Result 782 states and 1110 transitions. [2023-04-01 06:12:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:12:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 79 [2023-04-01 06:12:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:44,132 INFO L225 Difference]: With dead ends: 782 [2023-04-01 06:12:44,132 INFO L226 Difference]: Without dead ends: 446 [2023-04-01 06:12:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:12:44,134 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:44,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1171 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:12:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-04-01 06:12:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-04-01 06:12:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 301 states have (on average 1.4053156146179402) internal successors, (423), 306 states have internal predecessors, (423), 92 states have call successors, (92), 51 states have call predecessors, (92), 52 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 610 transitions. [2023-04-01 06:12:44,157 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 610 transitions. Word has length 79 [2023-04-01 06:12:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:44,158 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 610 transitions. [2023-04-01 06:12:44,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-01 06:12:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 610 transitions. [2023-04-01 06:12:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:12:44,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:44,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:44,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:44,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:44,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:44,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 32371437, now seen corresponding path program 1 times [2023-04-01 06:12:44,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:44,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762462710] [2023-04-01 06:12:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:44,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:12:44,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:44,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762462710] [2023-04-01 06:12:44,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762462710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:44,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:12:44,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:12:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132487020] [2023-04-01 06:12:44,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:44,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:12:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:12:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:12:44,490 INFO L87 Difference]: Start difference. First operand 446 states and 610 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-01 06:12:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:44,542 INFO L93 Difference]: Finished difference Result 810 states and 1120 transitions. [2023-04-01 06:12:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:12:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-04-01 06:12:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:44,544 INFO L225 Difference]: With dead ends: 810 [2023-04-01 06:12:44,544 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 06:12:44,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:12:44,546 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 5 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:44,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 732 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:12:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 06:12:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2023-04-01 06:12:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 307 states have (on average 1.3973941368078175) internal successors, (429), 312 states have internal predecessors, (429), 92 states have call successors, (92), 53 states have call predecessors, (92), 54 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 616 transitions. [2023-04-01 06:12:44,571 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 616 transitions. Word has length 87 [2023-04-01 06:12:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:44,571 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 616 transitions. [2023-04-01 06:12:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-01 06:12:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 616 transitions. [2023-04-01 06:12:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:12:44,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:44,572 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:12:44,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:44,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:44,573 INFO L85 PathProgramCache]: Analyzing trace with hash 178888331, now seen corresponding path program 1 times [2023-04-01 06:12:44,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:44,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321439632] [2023-04-01 06:12:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:12:44,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:44,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321439632] [2023-04-01 06:12:44,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321439632] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:44,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812314803] [2023-04-01 06:12:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:45,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:45,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:45,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:45,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 06:12:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:45,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 06:12:45,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:12:45,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:12:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812314803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:45,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:12:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-04-01 06:12:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455737605] [2023-04-01 06:12:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:45,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:12:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:12:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:12:45,223 INFO L87 Difference]: Start difference. First operand 454 states and 616 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-01 06:12:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:45,323 INFO L93 Difference]: Finished difference Result 828 states and 1140 transitions. [2023-04-01 06:12:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:12:45,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-04-01 06:12:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:45,325 INFO L225 Difference]: With dead ends: 828 [2023-04-01 06:12:45,326 INFO L226 Difference]: Without dead ends: 464 [2023-04-01 06:12:45,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:12:45,327 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:45,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1171 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:12:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-01 06:12:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2023-04-01 06:12:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 315 states have (on average 1.3873015873015873) internal successors, (437), 320 states have internal predecessors, (437), 92 states have call successors, (92), 55 states have call predecessors, (92), 56 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 624 transitions. [2023-04-01 06:12:45,351 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 624 transitions. Word has length 87 [2023-04-01 06:12:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:45,351 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 624 transitions. [2023-04-01 06:12:45,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-04-01 06:12:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 624 transitions. [2023-04-01 06:12:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:12:45,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:45,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:45,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 06:12:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:45,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:45,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1853869837, now seen corresponding path program 1 times [2023-04-01 06:12:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:45,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136866521] [2023-04-01 06:12:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 06:12:45,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:45,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136866521] [2023-04-01 06:12:45,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136866521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:12:45,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:12:45,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:12:45,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813910433] [2023-04-01 06:12:45,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:12:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:12:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:12:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:12:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:12:45,690 INFO L87 Difference]: Start difference. First operand 464 states and 624 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 06:12:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:12:45,747 INFO L93 Difference]: Finished difference Result 850 states and 1154 transitions. [2023-04-01 06:12:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:12:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 95 [2023-04-01 06:12:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:12:45,750 INFO L225 Difference]: With dead ends: 850 [2023-04-01 06:12:45,750 INFO L226 Difference]: Without dead ends: 476 [2023-04-01 06:12:45,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:12:45,752 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 7 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:12:45,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 734 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:12:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-04-01 06:12:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2023-04-01 06:12:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 325 states have (on average 1.3753846153846154) internal successors, (447), 330 states have internal predecessors, (447), 92 states have call successors, (92), 57 states have call predecessors, (92), 58 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2023-04-01 06:12:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 634 transitions. [2023-04-01 06:12:45,780 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 634 transitions. Word has length 95 [2023-04-01 06:12:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:12:45,780 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 634 transitions. [2023-04-01 06:12:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 06:12:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 634 transitions. [2023-04-01 06:12:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 06:12:45,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:12:45,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:12:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:12:45,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:12:45,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:12:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1875677509, now seen corresponding path program 1 times [2023-04-01 06:12:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:12:45,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291724557] [2023-04-01 06:12:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:12:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 06:12:46,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:12:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291724557] [2023-04-01 06:12:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291724557] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:12:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593039830] [2023-04-01 06:12:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:12:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:12:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:12:46,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:12:46,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 06:12:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:12:46,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 06:12:46,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:12:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:12:47,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:12:49,802 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8191 disjunctions. This might take some time... [2023-04-01 06:12:54,945 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8191 disjunctions.